Addition curing silicone rubber impression materials. An appraisal of their physical properties

McCabe, J F; Wilson, H.J.

doi:10.1038/sj.bdj.4804105

Cited by 34 publications

(10 citation statements)

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“…2,4,6,7,[15][16][17][18][19] Polyvinyl siloxane impression materials are considered dimensionally stable over time. 15,16 Clancy et al 4 found that addition silicone impression materials remained stable after four weeks of making the impression. Williams and Jackson 6 suggested that addition silicone materials produced superb and dimensionally stable die models made after 1, 4 and 24 hours form impression making.…”

Section: Discussionmentioning

confidence: 99%

Comparative Analysis of Dimensional Precision of Different Silicone Impression Materials

Zarea

Sughaireen²

2011

The Journal of Contemporary Dental Practice

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Objectives:To investigate the accuracy of four commercial types of additional silicone impression materials (AFFINIS ® , Virtual ® , Relay 2002 CD ® and Silagum ® ). Materials and methods:The accuracy of impression material was measured indirectly by measuring three dimensions on stone cast poured from impressions of a stainless steel master model. The three dimensions on stone cast were measured at 1 hour, 2 days, 1 and 2 weeks after making the impression. Two impression techniques were used in the current study. The two-step impression technique was used for AFFINIS ® and Virtual ® , while single-step technique was used for Relay 2002 CD ® and Silagum ® materials. Twenty impressions were made of the master cast at four different periods for each of the tested four materials with a total of 320 impressions. Two vertical dimensions and one horizontal dimension were measured on master cast using optical microscope. Statistical analysis was run to compare the mean measurements for tested casts from each impression and time interval with the master cast. Results:No statistical significant differences were found (p > 0.05) in the accuracy of tested materials. There was no significant difference of master cast and impression cast means over time. Additionally, impression technique could be correlated with accuracy. Conclusion:The tested additional silicones showed accuracy over time and they could be delayed up to 4 weeks duration without any significant changes in its dimensional stability. Silagum ® impression material was the most accurate followed by Relay 2002 CD ® , Virtual ® and AFFINIS ® .

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Section: Discussionmentioning

confidence: 99%

Comparative Analysis of Dimensional Precision of Different Silicone Impression Materials

Zarea

Sughaireen²

2011

The Journal of Contemporary Dental Practice

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“…He also found silicone to be less stable than the other two materials. Craig (1977) and McCabe & Wilson (1978) concluded that polysiloxane materials were stable over time.…”

Section: Discussionmentioning

confidence: 99%

Long‐term dimensional stability of three current elastomers

Clancy

Scandrett

Ettinger

1983

J of Oral Rehabilitation

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The long-term dimensional stability of three non-aqueous elastomeric impression materials, a silicone, a polyether and a polysiloxane, were investigated. The testing apparatus was an A.D.A. specification No. 19 test block and mould. The impressions were measured by the use of a travelling stage reflecting microscope and a Quantimet 720 Image Analyzing computer at time zero and again at 4, 24 and 48 h, and at 1, 2, 3 and 4 weeks. Impressions poured immediately had the greatest accuracy for all the materials. The polysiloxane (0.025 mm) and polyether (0.033 mm) showed very little change in dimension after 4 weeks when compared to the test block. However, the silicone showed significant change at 4 h (0.14 mm) and 0.2 mm after 4 weeks. After 4 weeks the polysiloxane maintained the best surface detail, the polyether was adequate but the silicone lost much of its detail in as little as 24 h. The reasons for these findings are discussed.

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“…All silastomers undergo slight shrinkage as they polymerize, and most shrinkage occurs in the first hour after the impression is taken (Craig et al, 1987;McCabe and Wilson, 1978). Condensation-curing materials generally show greater shrinkage than the addition-curing materials, and the former continue to shrink for days after the impression is taken.…”

Section: Taking the Impressionmentioning

confidence: 99%

Live primates and dental replication: New problems and new techniques

Teaford

Oyen

1989

American J Phys Anthropol

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Dental microwear analyses are beginning to provide new insights into the intricacies of jaw movement and tooth use in modern and extinct mammals. However, these analyses are also raising new questions that are best answered through studies of live animals with known diets. The process of taking dental impressions from live animals is a difficult one that presents problems different from those encountered in working with museum material. This report presents a review of some of those problems together with solutions that have been developed in the course of laboratory work with nonhuman primates. It also summarizes recent developments in dental casting.

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Addition curing silicone rubber impression materials. An appraisal of their physical properties

Cited by 34 publications

References 0 publications

Comparative Analysis of Dimensional Precision of Different Silicone Impression Materials

Comparative Analysis of Dimensional Precision of Different Silicone Impression Materials

Long‐term dimensional stability of three current elastomers

Live primates and dental replication: New problems and new techniques

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